21-CONTENTS
 GUN Page 8 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL CHAPTER 21 - AIR CONDITIONING TABLE OF CONTENTS
_________________
 Subject
_______
WATER SEPARATOR
Maintenance Practices Cleaning Functional Test Installation Removal
EQUIPMENT COOLING SYSTEM
Description and Operation General Card - Equipment Cooling Cleaner - Air Detector - Low Flow Fan - Aft Equipment Cooling Fan - Supply and Exhaust Screen - Fan Sensor - Fan Current Switch - Differential Pressure Switch - Equipment Cooling
Mode Select Switch - Overheat Switch - Skin Temperature Valve - E6/E9 Valve - Fan Check Valve - Ground Exhaust Valve - Inboard Valve - Smoke/Override Valve - 3-Way Operation
Adjustment/Test Inspection/Check CARD - EQUIPMENT COOLING
Removal/Installation CLEANER - EQUIPMENT COOLING AIR
Maintenance Practices Cleaning Removal and Installation Chapter SectionSubject_______ Page
21-51-05201 206201208204
21-58-001 1988777989
981711179
501 601
21-58-05401
21-58-10201 201202Effectivity
ALL
ALL
ALLALLALLALL
 21-CONTENTS
 GUN Page 9 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 CHAPTER 21 - AIR CONDITIONING
 TABLE OF CONTENTS
_________________
 Chapter
 Section
 Subject_______  Subject_______ 
DETECTOR - LOW FLOW  21-58-02
 Maintenance Practices 
Cleaning 
Removal and Installation 
FANS - EQUIPMENT COOLING  21-58-01
 Removal/Installation 
Cleaning/Painting 
SCREEN - EQUIPMENT COOLING FAN  21-58-15
 Cleaning/Painting 
SCREEN - EQUIPMENT COOLING INLET  21-58-11
 Maintenance Practices 
Cleaning 
Removal and Installation 
SWITCH - DIFFERENTIAL PRESSURE  21-58-09
 Removal/Installation 
SWITCH - OVERHEAT  21-58-08
 Maintenance Practices 
SWITCH - SKIN TEMPERATURE  21-58-07
 Removal/Installation 
VALVE - CHECK  21-58-03
 Removal/Installation 
Inspection/Check 
VALVE - EQUIPMENT COOLING  21-58-14
 THREE-WAY
 Removal/Installation 
VALVE - E6/E9  21-58-13
 Removal/Installation 
VALVE - GROUND EXHAUST  21-58-12
 Removal/Installation 
VALVE - NINE-INCH DUCT  21-58-04
 Removal/Installation 
VALVE - SMOKE/OVERRIDE  21-58-06
 Removal/Installation 
TEMPERATURE CONTROL___________________ 21-60-00

Page____  Effectivity___________
201  ALL
205
201
401  ALL
701  ALL
701  ALL
201  ALL
204
201
401  ALL
201  ALL
401  ALL
401  ALL
601  ALL
401  ALL
401  ALL
401  ALL
401  ALL
401  ALL

 21-CONTENTS
 GUN Page 10 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 CHAPTER 21 - AIR CONDITIONING
 TABLE OF CONTENTS_________________
 Chapter
 Section
 Subject Subject_______ _______  Page____  Effectivity___________
 Component Location  101  ALL
 Component Index
 Component Location
 ZONE TEMPERATURE CONTROL SYSTEM 21-61-00
 Description and Operation  1  ALL
 General  1
 Controller - Zone Temperature  11
 Module - Cabin Temperature  1
 Control
 Selector - Cabin Temperature,  11
 Digital
 Sensor - Duct Temperature  12
 Sensor - Pressure, Trim Air  13
 Sensor - Zone Temperature  12
 Switch - Duct Overtemperature  12
 Valve - Flight Deck Flow  13
 Regulating
 Valve - Modulating, Trim Air  12
 Valve - Shutoff, Cargo Trim  12
 Air
 Valve - Shutoff, Master Trim  12
 Air
 Operation  13
 Adjustment/Test  501  ALL
 BITE Test  501
 CONTROLLER - ZONE TEMPERATURE 21-61-01
 Removal/Installation  401  ALL
 FILTER - ZONE TEMPERATURE SENSOR 21-61-06
　
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